Find a calculator approximation to four decimal places for each circular function value. See Example 3. cos (-1.1519)
Table of contents
- 0. Review of College Algebra4h 45m
- 1. Measuring Angles40m
- 2. Trigonometric Functions on Right Triangles2h 5m
- 3. Unit Circle1h 19m
- 4. Graphing Trigonometric Functions1h 19m
- 5. Inverse Trigonometric Functions and Basic Trigonometric Equations1h 41m
- 6. Trigonometric Identities and More Equations2h 34m
- 7. Non-Right Triangles1h 38m
- 8. Vectors2h 25m
- 9. Polar Equations2h 5m
- 10. Parametric Equations1h 6m
- 11. Graphing Complex Numbers1h 7m
3. Unit Circle
Trigonometric Functions on the Unit Circle
Problem 43
Textbook Question
Find a calculator approximation to four decimal places for each circular function value. See Example 3.
cot 6.0301
Verified step by step guidance1
Recall that the cotangent function is the reciprocal of the tangent function. So, \( \cot x = \frac{1}{\tan x} \).
Identify the angle given: \( x = 6.0301 \) radians. Since this is in radians, ensure your calculator is set to radian mode before calculating.
Calculate \( \tan(6.0301) \) using your calculator.
Find the reciprocal of the value obtained in the previous step to get \( \cot(6.0301) = \frac{1}{\tan(6.0301)} \).
Round the result to four decimal places to get the final approximation.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Circular Functions
Circular functions, also known as trigonometric functions, relate angles to ratios of sides in a right triangle or coordinates on the unit circle. They include sine, cosine, tangent, and their reciprocals such as cotangent. Understanding these functions helps in evaluating values for any given angle.
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Graphs of Common Functions
Cotangent Function
The cotangent function is the reciprocal of the tangent function, defined as cot(θ) = 1/tan(θ) or cot(θ) = cos(θ)/sin(θ). It is important to know how to compute cotangent values, especially for angles not commonly found on standard unit circle tables, often requiring calculator use.
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Introduction to Cotangent Graph
Calculator Approximation and Rounding
Using a scientific calculator to find trigonometric values involves inputting the angle in the correct mode (radians or degrees) and then rounding the result to the desired decimal places. For this problem, the angle is likely in radians, and the answer must be rounded to four decimal places for precision.
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